Include Catalysts in Balanced Chemical Equations?

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Amy Pham 1D
Posts: 88
Joined: Fri Aug 09, 2019 12:15 am

Include Catalysts in Balanced Chemical Equations?

Postby Amy Pham 1D » Sun Oct 06, 2019 4:45 pm

When there is a catalyst taking part in a chemical reaction, do we include it when we write the balanced chemical equation for the reaction? For example, Question H7d from the Fundamentals homework:

Write a balanced chemical equation for each of the following reactions.
d) The reaction of ammonia gas with oxygen gas at high temperatures in the presence of a copper metal catalyst produces the gases water and nitrogen dioxide.

4 NH3 (g) + 7 O2 (g) --> 6 H2O (g) + 4 NO2 (g)
OR
4 NH3 (g) + 7 O2 (g) + Cu (s) --> 6 H2O (g) + 4 NO2 (g)

ShravanPatel2B
Posts: 52
Joined: Fri Aug 30, 2019 12:18 am

Re: Include Catalysts in Balanced Chemical Equations?

Postby ShravanPatel2B » Sun Oct 06, 2019 4:51 pm

I read in the book that catalysts are just written on top of the arrow in the equation so thats what I did for my answer

Chem_Mod
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Re: Include Catalysts in Balanced Chemical Equations?

Postby Chem_Mod » Sun Oct 06, 2019 8:59 pm

Catalysts are not included in the balanced chemical equation as they are not consumed nor produced in the reaction. Catalysts lower the activation energy of a reaction, increasing the reaction rate. This is outside the scope of 14A though; you'll learn more about catalysts and reaction rates in 14B.


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